Do all arthropods use spiracles to get oxygen?

Not all arthropods use spiracles to obtain oxygen, but many do. Spiracles are openings on the exoskeleton that lead to a network of tracheae, allowing gas exchange. Aquatic arthropods, such as many crustaceans, typically use gills instead of spiracles for respiration. Therefore, while spiracles are common in terrestrial arthropods, they are not universal among all arthropods.